Since we as captains aren't actually operating the TDC directly, I honestly don't see the practical difference between the tbt sending bearing information directly to the tdc and the tbt sending bearing information to the tdc operator who then enters it into the tdc.
That being said, there is something very important in the link provided by snakedocpl. It says directly on the very same page:
Quote:
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14C6. New installations. The latest design installations have, in addition to the units described above, additional transmitters operated by the sound gear and the periscopes for the transmission of both bearing and range to the stations equipped with indicators. In addition, an improved model of the target bearing transmitter is provided with an own course dial energized from the gyro repeater panel so that the true as well as the relative bearing may be read at the instrument. The ship's plans should be consulted for details.
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The question is what is meant by new installations? 43? 44? Just after the war? That manual was published less than a year after japan surrendered. I wonder if anybody has more specific information?